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Light Scattering and Infrared Absorption in Cuprous Oxide
Author(s) -
Reydellet J.,
Balkanski M.,
Trivich D.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220520120
Subject(s) - infrared , scattering , crystal (programming language) , phonon , lattice (music) , absorption (acoustics) , infrared spectroscopy , symmetry (geometry) , materials science , molecular physics , oxide , perfect crystal , light scattering , chemistry , condensed matter physics , optics , crystallography , physics , geometry , mathematics , computer science , acoustics , vacancy defect , metallurgy , programming language , organic chemistry
A great number of bands have been observed by light scattering and infrared absorption in Cu 2 O crystals corresponding to transitions most of which are normally forbidden in the perfect crystal. An analysis of the symmetry properties of the lattice modes in the presence of defects is given. In particular the role of each symmetry site for the defects is investigated and the observed modes interpreted as being due to actived band modes and localized modes. Double phonon processes are observed as well as the normally allowed optical transtions for the perfect crystal.